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OTHER CURRENT LIABILITIES (Detail) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Other Liabilities, Current [Abstract]    
Accrued legal $ 4,477 $ 2,202
Income taxes payable 0 219
Other current liabilities 1,226 1,475
Total other current liabilities $ 5,703 $ 3,896